From nobody Fri Apr 3 16:01:34 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9551139022B for ; Tue, 24 Mar 2026 09:50:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774345803; cv=none; b=cS9nzB7oFs9TGstJxNf+9L6oWNaoGsSZMADYs7QJOPgovqscQtc9KgMTZGGldu2sp4peuLnvSlMWd+PCiWZNIoAZdaSzGmyFFJTXqLlh3/tvzWWc3xdJ5RZphtut+e+5AzHar9+mSqtFUA3TWSlb6MBF85dqMHT5TKSZVVW5HJU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774345803; c=relaxed/simple; bh=T9kQUcLEzgnq+9wUjyQRoFnUMCb6dHQz4GedubhV2ZM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ISGlsPthqkICrttXYujXXPAJ/gqZQEw7Bt0toCdtpn+xL89N8B7xjBaoVMFU62PNZnP4TKXuQxZ6fFvFrUSt9YtvKV3M7CgpeQ9HYQhO3r7fTLAYaVEN7FD52g09qVIbr53x55UlwoW+HmLiSfiExpt64eDOb3oc2EPMnsQniQo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=epxWMKPk; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="epxWMKPk" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1774345801; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=33jZYy+kVgo9I3jnxoYq18WEqNxEKHpsQgdAp+R82tQ=; b=epxWMKPkZNzNMMX8+MSH5kCOFZMVSaUtDeNxUklMvXh9REx2/QnJp8Epzbz0+YKJnto8B3 0Q33DM2QyFCJUUD+s52cCN6hQG3JHXA0nFNv+SV6Bu0l2MnbyeWKcAylXD9hLNauq7Uk4X ICnzFTzw3djwPEgfe8upZ1ti11LlZjc= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-647-fmmzxXonPomwp4_ey5VEAg-1; Tue, 24 Mar 2026 05:49:57 -0400 X-MC-Unique: fmmzxXonPomwp4_ey5VEAg-1 X-Mimecast-MFC-AGG-ID: fmmzxXonPomwp4_ey5VEAg_1774345793 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 191C418005B3; Tue, 24 Mar 2026 09:49:53 +0000 (UTC) Received: from vschneid-thinkpadt14sgen2i.remote.csb (unknown [10.44.34.246]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id AA8B8300019F; Tue, 24 Mar 2026 09:49:39 +0000 (UTC) From: Valentin Schneider To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Arnaldo Carvalho de Melo , Josh Poimboeuf , Paolo Bonzini , Arnd Bergmann , Frederic Weisbecker , "Paul E. McKenney" , Jason Baron , Steven Rostedt , Ard Biesheuvel , Sami Tolvanen , "David S. Miller" , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Mel Gorman , Andrew Morton , Masahiro Yamada , Han Shen , Rik van Riel , Jann Horn , Dan Carpenter , Oleg Nesterov , Juri Lelli , Clark Williams , Tomas Glozar , Yair Podemsky , Marcelo Tosatti , Daniel Wagner , Petr Tesarik , Shrikanth Hegde Subject: [RFC PATCH v8 05/10] sched/isolation: Mark housekeeping_overridden key as __ro_after_init Date: Tue, 24 Mar 2026 10:47:56 +0100 Message-ID: <20260324094801.3092968-6-vschneid@redhat.com> In-Reply-To: <20260324094801.3092968-1-vschneid@redhat.com> References: <20260324094801.3092968-1-vschneid@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Content-Type: text/plain; charset="utf-8" housekeeping_overridden is only ever enabled in the __init function housekeeping_init(), and is never disabled. Mark it __ro_after_init. Signed-off-by: Valentin Schneider --- kernel/sched/isolation.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index 3ad0d6df6a0a2..54d1d93cdeea5 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -16,7 +16,7 @@ enum hk_flags { HK_FLAG_KERNEL_NOISE =3D BIT(HK_TYPE_KERNEL_NOISE), }; =20 -DEFINE_STATIC_KEY_FALSE(housekeeping_overridden); +DEFINE_STATIC_KEY_FALSE_RO(housekeeping_overridden); EXPORT_SYMBOL_GPL(housekeeping_overridden); =20 struct housekeeping { --=20 2.52.0